CVE-2024-50130

HIGH EPSS 13.8%
Published Nov 5, 20241y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Nov 5, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: must hold reference on net namespace BUG: KASAN: slab-use-after-free in __nf_unregister_net_hook+0x640/0x6b0 Read of size 8 at addr ffff8880106fe400 by task repro/72= bpf_nf_link_release+0xda/0x1e0 bpf_link_free+0x139/0x2d0 bpf_link_release+0x68/0x80 __fput+0x414/0xb60 Eric says: It seems that bpf was able to defer the __nf_unregister_net_hook() after exit()/close() time. Perhaps a netns reference is missing, because the netns has been dismantled/freed already. bpf_nf_link_attach() does : link->net = net; But I do not see a reference being taken on net. Add such a reference and release it after hook unreg. Note that I was unable to get syzbot reproducer to work, so I do not know if this resolves this splat.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
13.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥6.4  –  <6.6.59
linuxlinux_kernel*≥6.7  –  <6.11.6
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any
linuxlinux_kernel6.12any

References 3

  • git.kernel.org https://git.kernel.org/stable/c/1230fe7ad3974f7bf6c78901473e039b34d4fb1f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0d7939543a1b3bb93af9a18d258a774daf8f162
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f41bd93b3e0508edc7ba820357f949071dcc0acc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1230fe7ad3974f7bf6c78901473e039b34d4fb1f
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d0d7939543a1b3bb93af9a18d258a774daf8f162
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f41bd93b3e0508edc7ba820357f949071dcc0acc
    Patch